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What type of sunscreen do I need?

lady with spf on face
Wondered if your kids’ SPF protects you the same way? Or what exactly the numbers mean? When it comes to sunscreen, we’ve got you covered...

Not all sunscreens are created equal... so it’s crucial you’re getting the right protection.  

But what do they all do? Is one type more effective than others? And which one’s right for you? Find out right here.  

What is SPF?

What is SPF?

SPF stands for “sun protection factor”. It measures the amount of protection you get from your sunscreen.  

The higher the SPF number, the more protection you’ll have from the sun’s UV rays. Or, more specifically, the longer you’re protected for.

But it doesn’t mean a specific length of time – SPF 30 doesn’t mean it protects you for 30 minutes, for example. Instead, wearing an SPF 30 would take you 30 times longer to burn than if you didn’t wear any sunscreen.¹ 

Why do we need to wear it?

There are two different types of UV rays (UVA and UVB) that affect our skin differently, but they can both cause sunburn, suntan, and skin damage.² 

SPF helps to stop UV rays from damaging our skin. There are two types of SPF: ³ 

  • Mineral SPF, which acts like a shield. It blocks the rays and deflects them away from the skin. 

  • Chemical SPF, which acts like a sponge and absorbs the rays. 

All SPF will protect against UVB rays, but for UVA and UVB protection you’ll need to look for a “broad spectrum” sunscreen. 

How often should we wear it?

How often should we wear it?

According to the NHS, you should always wear an SPF of at least 30 during the warmest times of the year. In the UK, this is between March and October.⁴ 

But UV rays can cause damage in any weather, so you’ll get the most protection by wearing it all year round.  

It’s recommended to reapply your sunscreen every 2 hours. 

What do the numbers mean?

The higher the SPF rating, the more protection it offers – or, more specifically, the longer it protects you for. 

With perfect use, wearing an SPF 30 would take you 30 times longer to burn than if you didn’t wear any.¹ 

No sunscreen can block out all UV rays entirely, but a higher SPF will block a higher percentage of UVB. When used correctly, SPF 30 blocks about 97% of UVB, while SPF 50 blocks about 98%.⁵ 

The SPF rating on a sun lotion or suncream does not show its protection against UVA rays. Instead, look for a “star” rating on the bottle.   

The more stars the better; the highest number is 5. You should choose a product with at least 4 stars to help protect you against UVA damage.⁴ 

Reapplying after being in the water

Reapplying after being in the water

It can be easy to forget about your sunscreen if you’re in and out of the water all day. You might feel nice and cool if you’ve taken a dip, but water washes sunscreen off. It also reflects UV rays, increasing your exposure.⁴ 

Always reapply your sunscreen after you’ve been in the water, even if it’s water-resistant. You should also reapply if you’ve been sweating a lot or if you’ve rubbed it off (i.e. drying yourself with a towel).  

Put in on your entire body, including your face (even if you’re going to wear makeup). Adults should use about 6-8 teaspoons in total to make sure it’s applied thickly enough.⁴ 

Do children need different SPF protection?

Babies and children need extra care in the sunlight. Their skin is much more sensitive, and sun damage at a young age can put you at risk later on in life.  

Make sure to: 

  • Use an SPF of at least 30 on your child every day, between March and October if you’re in the UK.⁴ However, the British Skin Foundation recommends using at least SPF 50 for children.⁶ 

  • Look out for the star ratings on the bottle, too. At least 4 stars is recommended.⁴ 

  • Keep your child in the shade as much as you can between 11am and 3pm.  

  • Apply sunscreen at least 15-20 minutes before going outside. Use enough to generously cover the whole body – about 5 teaspoons for a child.⁶ 

  • Reapply sunscreen every two hours, even if your child’s sunscreen is waterproof. Reapply before this if they have been in the water or sweated a lot. 

  • Cover your child with loose, breathable clothing, sunglasses, and a wide-brimmed hat. 

  • Keep babies and toddlers in the shade as much as possible.⁶ Children under 6 months should always be kept out of strong, direct sunlight.⁴ 

What forms of sunscreen are there?

What forms of sunscreen are there?


The old faithful: this is the sunscreen you’ll find in a bottle. 

Suncream is generally recommended for top protection, as some research has found that people often do not apply enough spray sunscreen to be totally effective.⁷ 

It’s easier to see where you’ve applied suncream and to make sure you’re getting a full-coverage, even layer.  

However, some people may not like the way it feels on their skin, or it may irritate their skin or eyes. Depending on your skin tone, you might find that white suncreams or lotions are visible on your skin.  

Mists & sprays

These are a great option on the go, as they’re quick and easy to reapply. They’re lighter in formulation, so they’re a good option for makeup wearers or those who don’t like the feel of creams on their skin.  

They can also be useful if you struggle to reach certain parts of your body.  

Many mists and sprays are clear, so they won’t be visible on the skin. 

However, it can be more difficult to see how much you’ve used (especially with a clear spray). It may be harder to apply a layer that’s thick enough and you may be more likely to miss a spot. 

If you apply it generously, you should still get the sun protection you need – you just need to be more careful.  

SPF in makeup & skincare

SPF in makeup & skincare

These are great for providing extra everyday protection. However, SPF makeup and skincare is not usually enough to protect you on its own. 

This is because the SPF is often not high enough, or you’re not using it all over your face. Even moisturisers or foundations with the recommended SPF may not be applied generously enough to fully protect you. 

Facial sunscreen

These are specially designed for your face, so they may be gentler on blemish-prone skin or sit better under your makeup. 

If you’re using this as the only form of sun care on your face, make sure you’re using a facial sunscreen and not a moisturiser with SPF.  


A roll-on can be a great option, especially if you’re travelling or you’re with children. They’re easy to apply and run less risk of mess than your traditional cream. 

However, like a spray, you may need to make sure you’re applying a thick enough layer to allow it to fully protect you.  

Kids' sunscreen

Kids' sunscreen

A kids' SPF 30 will offer the same protection as an adult’s SPF 30, so don’t worry.

You might find that some kids’ sunscreens contain ingredients that help it appeal more to children (like scents or colours). Some might be formulated with younger, more sensitive skin in mind. They might be waterproof or in more travel-friendly bottles.  

But, in terms of UVA and UVB protection, there’s no difference than a standard bottle. Just be sure to check your SPF number and star rating.  

The final say

Solved your FAQs on SPF? 

We hope this helps you have a safer summer. Check out the articles below for a few extra tips: 


The advice in this article is for information only and should not replace medical care. Please check with your GP or healthcare professional before trying any supplements, treatments or remedies. Food supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle. 



1. https://www.skincancer.org/blog/ask-the-expert-does-a-high-spf-protect-my-skin-better/    

2. https://www.royalberkshire.nhs.uk/media/pazpj3cj/sun-and-your-skin_may22.pdf   

3. https://www.skincancer.org/skin-cancer-prevention/sun-protection/sunscreen/   

4. https://www.nhs.uk/live-well/seasonal-health/sunscreen-and-sun-safety/   

5. https://www.britishskinfoundation.org.uk/blog/sunscreen-explained   

6. https://www.britishskinfoundation.org.uk/sun-safety-advice-for-parents   

7. https://www.health.harvard.edu/skin-cancer/which-is-best-for-optimal-sun-protection-sprays-or-lotions   


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